Payment

Due to being unemployed, I have made payments when I can. I get a telephone call from Nedbank because I am outstanding on my account. I told them that I had made 3 payments in the last month. But by the sounds of the agent they didn't bother to check their account to see if any payments had been made. Having told them about the payments they told me they would get back to me, but I have not heard anything. Don't these companies check their bank accounts before making their phone calls demanding money.